namespace CSharpPro._1030;

public class Demo
{
    private int id;
    private String name;

    public string Name
    {
        get => name;
        set => name = value ?? throw new ArgumentNullException(nameof(value));
    }

    
    public int Id
    {
        get => id;
        set => id = value;
    }

    public void TestPrint()
    {
        
        
        
        
        
    }

    public int add(int a, int b)
    {
        return a + b;
    }

    public double add(double a, double b)
    {
        return a + b;
    }
}